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Finding the Fourth Proportional to 253,880.64, 380,859.84 and 66,906.72

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Solution

The fourth proportional to 253,880.64, 380,859.84 and 66,906.72 is: 100,370.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,880.64 : 380,859.84 = 66,906.72 : x
  2. Step 2: Convert to fraction form
    253,880.64/380,859.84 = 66,906.72/x
  3. Step 3: Cross multiply
    253,880.64x = 380,859.84 × 66,906.72
  4. Step 4: Simplify right side
    253,880.64x = 25,482,082,674.12
  5. Step 5: Solve for x
    x = 25,482,082,674.12/253,880.64
  6. Step 6: Final answer
    x = 100,370.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.